package com.example.tests;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

import com.thoughtworks.xstream.XStream;

public class ContactDataGenerator {

	public static void main(String[] args) throws IOException {
		if (args.length < 3) {
		  System.out.println("Please specify parameters: <amount ot test data> <file> <format>");
	      return;
		}
		
        int amount = Integer.parseInt(args[0]);
        File file = new File(args[1]);
        String format = args[2];
        
        if (file.exists()) {
        	System.out.println("File exists, please remove it manually: " + file);
  	      return;
        }
        
        List<ContactData> contacts = generateRandomContacts(amount);
        if ("csv".equals(format)) {
        	saveContactsToCsvFile(contacts, file);
        } else if ("xml".equals(format)) {
        	saveContactsToXmlFile(contacts, file);
        } else {
        	System.out.println("Unknown format " + format);	
        }
        
       
	}

	private static void saveContactsToXmlFile(List<ContactData> contacts, File file) throws IOException {
		XStream xstream = new XStream();
		xstream.alias("contact", ContactData.class);
		String xml = xstream.toXML(contacts);
		FileWriter writer = new FileWriter(file);
		writer.write(xml);
		writer.close();
		
	}
	
	public static List<ContactData> loadContactsFromXmlFile(File file) {
		XStream xstream = new XStream();
		xstream.alias("contact", ContactData.class);
		return (List<ContactData>) xstream.fromXML(file);
		
	}

	private static void saveContactsToCsvFile(List<ContactData> contacts, File file) throws IOException {
		FileWriter writer = new FileWriter(file);
		for (ContactData contact : contacts) {
			writer.write(contact.getFirstname() + "," + contact.getLastname() + "," + contact.getAddress1() + "," + contact.getHomephone() + "," + contact.getMobilephone() + "," + contact.getWorkphone() + "," + contact.getEmail1() + "," + contact.getEmail2() + "," + contact.getBday() + "," + contact.getBmonth() + "," + contact.getByear() + "," + contact.getGroup() + "," + contact.getAddress2() + "," + contact.getHomephone2() + ",!" + "\n");
		}
		writer.close();
	}
	
	public static List<ContactData> loadContactsFromCsvFile(File file) throws IOException {
		List<ContactData> list = new ArrayList<ContactData>();
		FileReader reader = new FileReader(file);
		BufferedReader bufferedReader = new BufferedReader(reader);
		String line = bufferedReader.readLine();
		while (line != null) {
			String[] part = line.split(",");
			ContactData contact = new ContactData()
			.withFirstname(part[0])
			.withLastname(part[1])
			.withAddress1(part[2])
			.withHomephone(part[3])
			.withMobilephone(part[4])
			.withWorkphone(part[5])
			.withEmail1(part[6])
			.withEmail2(part[7])
			.withBday(part[8])
			.withBmonth(part[9])
			.withByear(part[10])
			.withGroup(part[11])
			.withAddress2(part[12])
			.withHomephone2(part[13]);
			list.add(contact);
			line = bufferedReader.readLine();
		}		
		bufferedReader.close();
		return list;
	}

	public static List<ContactData> generateRandomContacts(int amount) {
		 List<ContactData> list = new ArrayList<ContactData>();
		 for (int i = 0; i < amount; i++) {
			 ContactData contact = new ContactData()
			    .withFirstname(generateRandomString())
			    .withLastname(generateRandomString())
				.withAddress1(generateRandomString())
				.withHomephone(generateRandomString())
				.withMobilephone(generateRandomString())
				.withWorkphone(generateRandomString())
				.withHomephone(generateRandomString())
				.withEmail1(generateRandomString())
				.withEmail2(generateRandomString())
				.withBday(generateRandomDay())
				.withBmonth(generateRandomMonth())
				.withByear(generateRandomYear())
				.withGroup("")
				.withAddress2(generateRandomString())
				.withHomephone2(generateRandomString());
			 list.add(contact);
		 }
		 return list;
	}
	
	 public static String generateRandomString() {
		    Random rnd = new Random();
		    if (rnd.nextInt(3) == 0) {
		   	  return "";
		    } else {
		      return "test" + rnd.nextInt();
		    }
		 }
	 
	 public static String generateRandomMonth() {
		 String[]months = new String[]{"-","January","February","March","April","May","June", "July","August","September","October","November","December"};
		 int i = new Random().nextInt(13);
		 return months[i];
	 }
	 
	 public static String generateRandomDay() {
		 String[]day = new String[]{"-","1","2","3","4","5","6","7","8","9","10","11","12","13","14","15","16","17","18","19","20","21","22","23","24","25","26","27","28","29","30","31"};
		 int i = new Random().nextInt(32);
		 return day[i];
	 }
	    
	 public static String generateRandomYear() {
		int year = (new Random().nextInt(2999))+1;
		return  ""+(year);
	 }
}

